Installation
General
The design and provision of complementry ductwork
supports, etc., is the resposibility of others. Adequate
space, however, must be provided around the
unit/silencer combination to enable it to be easily
removed from the ductwork when required. It is also
important that the fan unit is mounted so that it is
readily accessible. Provide adequate space around the unit
to allow for the removal and the replacement of the
impeller and motor via the access panel.
Prior to installation, thoroughly clean the fan unit, paying
particular attention to its interior. Be particularly
thorough if the unit has been lying idle for several weeks
on an active building site or in a dust-laden environment.
A build up of cement dust, for example, could prove to
be very damaging, especially if throughput air were to be
damp.
During installation insert a gasket strip between joint
faces.
In a rigid mounting
If the unit is to be connected into, or at the end of
ductwork, lift into position and bolt flanges together.
If necessary, the unit can be lifted with suitable ties
attached to the four lifting eyes provided on all sizes
other than smallest 315,
If guards have been supplied, fit them to the open ends.
On resilient mountings
Resilient mountings are optional extras and are supplied
complete with mounting feet and the necessary fixings,
in kits numbered as specified in the table on page 4
Stiff structures must be available to mount the fan. These
structures must be so designed that the DuctMaster will
be seated on the resilient mountings, not over hanging
from them. For dimensions see pages 3 and 4.
Prior to installation prepare as follows:
(a) If supplied, attach silencers directly to the airmovers
using bolts at the corners.
(b) For units being prepared for horizontal mounting,
attach the resilient mountings and mounting feet at
the corner holes of the flanges as shown on this page
and page 4.
(c) For units being prepared for vertical mounting,
attach the resilient mountigs and mounting feet to the
particular unit or unit/silencer combination flanges
as shown on pages 3 and 5.
(d) Resilient mounting kits 4 to 7 can be adjusted for
height by turning the set screw.
Lift the unit or unit/silencer combination into position
and fix to the mounting structures. Resilient mountings
must stand vertical and not be unduly deflected in any
other plane.
Speed Controls
Controls can be mounted on any firm surfaces in any
attitude, through fixing holes in the bases. Drill and plug
the mounting surface as necessary, positioning controls
so that cover retaining screws will remain accessible.
This is particular important if a battery of controls is
being fitted. Fix with No. 8 woodscrews (not supplied)
or equivalent.
For wiring purposes, bases are provided with knock-outs
for cable entry, up to 20mm conduit on all models.
For dimensions and selection of speed controls see page
9 & 10.
Installation and Maintenance
DUCTMASTER DSA & DSM UNITS
2
Fig. 2b Rubber type resilient mounting
Fig. 2a Spring type resilient mounting
